CVE-2026-44621
An attacker can exploit multiple vulnerabilities in Unbound to perform a denial of service attack, disclose information, manipulate data, and bypass security measures.
CSIRTS triage
- What
- Multiple vulnerabilities allow an attacker to perform denial of service, disclose information, and manipulate data.
- Who is affected
- Deployments of Unbound are affected.
- Urgency
- Remediation is medium urgency as the vulnerabilities are not currently exploited.
- Action
- Update Unbound to the latest version to mitigate these vulnerabilities.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch CVE-2026-44621
Get an email if CVE-2026-44621 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.
Exploitation outlook
- Low exploitation risk0.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all EPSS-scored CVEs.
Advisory coverage (3)
- medium[NEW] [medium] Unbound: Multiple vulnerabilitiescert-bund · 2026-07-27
- mediumCVE-2026-44621: With NLnet Labs Unbound up to and including version 1.25.1, applications using libunbound and …nvd · 2026-07-22
- mediumCVE-2026-44621: Libunbound applications configured with 'unwanted-reply-threshold' could eventually be abruptl…msrc · 2026-07-14
External references
Embed the live status
— this badge updates automatically when the KEV or exploit status changes. How to embed it →
[](https://www.csirts.com/cve/CVE-2026-44621)